1 /* $OpenBSD: ttyflags.c,v 1.12 2009/10/27 23:59:34 deraadt Exp $ */ 2 /* $NetBSD: ttyflags.c,v 1.8 1996/04/09 05:20:30 cgd Exp $ */ 3 4 /* 5 * Copyright (c) 1996 Theo de Raadt 6 * Copyright (c) 1994 Christopher G. Demetriou 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by Christopher G. Demetriou. 20 * 4. The name of the author may not be used to endorse or promote products 21 * derived from this software without specific prior written permission 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 26 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 27 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 28 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 29 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 30 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 31 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 32 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 33 */ 34 35 #include <sys/types.h> 36 #include <sys/cdefs.h> 37 #include <sys/ioctl.h> 38 39 #include <err.h> 40 #include <errno.h> 41 #include <fcntl.h> 42 #include <limits.h> 43 #include <paths.h> 44 #include <stdio.h> 45 #include <stdlib.h> 46 #include <string.h> 47 #include <ttyent.h> 48 #include <unistd.h> 49 50 int all(int); 51 int ttys(char **, int); 52 int ttyflags(struct ttyent *, int); 53 void usage(void); 54 55 int nflag, vflag; 56 57 /* 58 * Ttyflags sets the device-specific tty flags, based on the contents 59 * of /etc/ttys. It can either set all of the ttys' flags, or set 60 * the flags of the ttys specified on the command line. 61 */ 62 int 63 main(int argc, char *argv[]) 64 { 65 int aflag, ch, rval, pflag = 0; 66 67 aflag = nflag = vflag = 0; 68 while ((ch = getopt(argc, argv, "panv")) != -1) 69 switch (ch) { 70 case 'a': 71 aflag = 1; 72 break; 73 case 'n': /* undocumented */ 74 nflag = 1; 75 break; 76 case 'p': 77 pflag = 1; 78 break; 79 case 'v': 80 vflag = 1; 81 break; 82 case '?': 83 default: 84 usage(); 85 } 86 argc -= optind; 87 argv += optind; 88 89 if (aflag && argc != 0) 90 usage(); 91 92 if (setttyent() == 0) 93 err(1, "setttyent"); 94 95 if (aflag) 96 rval = all(pflag); 97 else 98 rval = ttys(argv, pflag); 99 100 if (endttyent() == 0) 101 warn("endttyent"); 102 103 exit(rval); 104 } 105 106 /* 107 * Change all /etc/ttys entries' flags. 108 */ 109 int 110 all(int print) 111 { 112 struct ttyent *tep; 113 int rval; 114 115 rval = 0; 116 for (tep = getttyent(); tep != NULL; tep = getttyent()) 117 if (ttyflags(tep, print)) 118 rval = 1; 119 return (rval); 120 } 121 122 /* 123 * Change the specified ttys' flags. 124 */ 125 int 126 ttys(char **ttylist, int print) 127 { 128 struct ttyent *tep; 129 int rval; 130 131 rval = 0; 132 for (; *ttylist != NULL; ttylist++) { 133 tep = getttynam(*ttylist); 134 if (tep == NULL) { 135 warnx("couldn't find an entry in %s for \"%s\"", 136 _PATH_TTYS, *ttylist); 137 rval = 1; 138 continue; 139 } 140 141 if (ttyflags(tep, print)) 142 rval = 1; 143 } 144 return (rval); 145 } 146 147 148 /* 149 * Actually do the work; find out what the new flags value should be, 150 * open the device, and change the flags. 151 */ 152 int 153 ttyflags(struct ttyent *tep, int print) 154 { 155 int fd, flags = 0, rval = 0, st, sep = 0; 156 char path[PATH_MAX]; 157 char strflags[256]; 158 159 st = tep->ty_status; 160 strflags[0] = '\0'; 161 162 /* Find the full device path name. */ 163 (void)snprintf(path, sizeof path, "%s%s", _PATH_DEV, tep->ty_name); 164 165 if (print == 0) { 166 /* Convert ttyent.h flags into ioctl flags. */ 167 if (st & TTY_LOCAL) { 168 flags |= TIOCFLAG_CLOCAL; 169 (void)strlcat(strflags, "local", sizeof strflags); 170 sep++; 171 } 172 if (st & TTY_RTSCTS) { 173 flags |= TIOCFLAG_CRTSCTS; 174 if (sep++) 175 (void)strlcat(strflags, "|", sizeof strflags); 176 (void)strlcat(strflags, "rtscts", sizeof strflags); 177 } 178 if (st & TTY_SOFTCAR) { 179 flags |= TIOCFLAG_SOFTCAR; 180 if (sep++) 181 (void)strlcat(strflags, "|", sizeof strflags); 182 (void)strlcat(strflags, "softcar", sizeof strflags); 183 } 184 if (st & TTY_MDMBUF) { 185 flags |= TIOCFLAG_MDMBUF; 186 if (sep++) 187 (void)strlcat(strflags, "|", sizeof strflags); 188 (void)strlcat(strflags, "mdmbuf", sizeof strflags); 189 } 190 if (vflag) 191 printf("%s setting flags to: %s\n", path, strflags); 192 } 193 194 if (nflag) 195 return (0); 196 197 /* Open the device NON-BLOCKING, set the flags, and close it. */ 198 if ((fd = open(path, O_RDONLY | O_NONBLOCK, 0)) == -1) { 199 if (!(errno == ENXIO || 200 (errno == ENOENT && (st & TTY_ON) == 0))) 201 rval = 1; 202 if (vflag) 203 warn("open %s", path); 204 return (rval); 205 } 206 if (print == 0) { 207 if (ioctl(fd, TIOCSFLAGS, &flags) == -1) 208 if (errno != ENOTTY || vflag) { 209 warn("TIOCSFLAGS on %s", path); 210 rval = (errno != ENOTTY); 211 } 212 } else { 213 if (ioctl(fd, TIOCGFLAGS, &flags) == -1) 214 if (errno != ENOTTY || vflag) { 215 warn("TIOCGFLAGS on %s", path); 216 rval = (errno != ENOTTY); 217 } 218 if (flags & TIOCFLAG_CLOCAL) { 219 (void)strlcat(strflags, "local", sizeof strflags); 220 sep++; 221 } 222 if (flags & TIOCFLAG_CRTSCTS) { 223 if (sep++) 224 (void)strlcat(strflags, "|", sizeof strflags); 225 (void)strlcat(strflags, "rtscts", sizeof strflags); 226 } 227 if (flags & TIOCFLAG_SOFTCAR) { 228 if (sep++) 229 (void)strlcat(strflags, "|", sizeof strflags); 230 (void)strlcat(strflags, "softcar", sizeof strflags); 231 } 232 if (flags & TIOCFLAG_MDMBUF) { 233 if (sep++) 234 (void)strlcat(strflags, "|", sizeof strflags); 235 (void)strlcat(strflags, "mdmbuf", sizeof strflags); 236 } 237 printf("%s flags are: %s\n", path, strflags); 238 } 239 if (close(fd) == -1) { 240 warn("close %s", path); 241 return (1); 242 } 243 return (rval); 244 } 245 246 /* 247 * Print usage information when a bogus set of arguments is given. 248 */ 249 void 250 usage(void) 251 { 252 (void)fprintf(stderr, "usage: ttyflags [-pv] [-a | tty ...]\n"); 253 exit(1); 254 } 255